20422660 has 24 divisors (see below), whose sum is σ = 42975576. Its totient is φ = 8152320.

The previous prime is 20422657. The next prime is 20422669. The reversal of 20422660 is 6622402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1915456 + 18507204 = 1384^2 + 4302^2 .

It is not an unprimeable number, because it can be changed into a prime (20422669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14800 + ... + 16120.

It is an arithmetic number, because the mean of its divisors is an integer number (1790649).

Almost surely, 2^20422660 is an apocalyptic number.

20422660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422660 is an abundant number, since it is smaller than the sum of its proper divisors (22552916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20422660 is a wasteful number, since it uses less digits than its factorization.

20422660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2101 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20422660 is about 4519.1437242026. The cubic root of 20422660 is about 273.3405742017.

The spelling of 20422660 in words is "twenty million, four hundred twenty-two thousand, six hundred sixty".